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Results tagged with qgis
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user 6793
QGIS is a cross-platform GIS application licensed under the GNU General Public License.
3
votes
How do I automatically fill a table column?
This can be done with the Field Calculator. If you open the attribute table and click on the little button at the bottom that looks like a calculator (you may need to enter "editing" mode first). This …
- 6,785
1
vote
Open --> Setting --> Project Properties will shut down Qgis
This sounds like a bug, so you'll probably want to report it to the QGIS bug tracker which you can find here:
http://hub.qgis.org/projects/quantum-gis/issues
If it is a bug they'll be able to fix it for …
- 6,785
2
votes
How to speed up working with QGIS 1.7.4 or is it slow?
Also, if you want to stick to QGIS, try uninstalling it and using a different version. …
- 6,785
2
votes
Working out percentage in QGIS field calculator
The equation for the field calculator should simply be something like:
(FIELDNAME_1 / FIELDNAME_2) * 100
Where FIELDNAME_1 = the field with the number of a particular crime and FIELDNAME_2 = the fie …
- 6,785
0
votes
Converting classified raster map back into vector classes using QGIS?
I can't see your screenshot (Web-filtering; bah), however from your text I'm guessing you're trying to convert a raster to points.
ArcGIS has a tool:
ArcToolbox -> Conversion Tools -> From Raster -> …
- 6,785
1
vote
Creating a quality raster map in QGIS?
You can do this using QGIS' Raster calculator. Using 1.8.0:
Add your two layers.
Zoom to their extent.
Navigate to: Raster -> Raster Calculator
Enter your expression. …
- 6,785
1
vote
Mean coordinate issue with multipart polygons
Simplify Geometries might be the way to go in the QGIS toolbox, or v.generalize using doublas as the algorithm. …
- 6,785
28
votes
Accepted
Using Elseif Conditional Statement in QGIS Field Calculator?
You have a few problems in your modified statement.
Inconsistent use of quotes around "in progress'
You don't need quotes around column names.
You're using an "ELSEIF" when it should be a "WHEN".
…
- 6,785
2
votes
How to ceate a point layer from a table in PostGIS?
This tutorial should answer your question: Working with your PostGIS Layers using Quantum GIS (QGIS)
- from Viewing PostGIS Layers using QGIS about half way down. …
- 6,785
3
votes
Configuring QGIS to show only toolbars wanted?
Going into a little more depth than Nathan's answer, the actual changes themselves are stored within QGIS in the following locations (Operating system dependent):
Linux it is found in: ~/.config/QuantumGIS … /QGIS.conf
Windows: the registry HKEY_CURRENT_USER\Software\QuantumGIS\QGIS
Mac: ~/Library/Preferences/org.qgis.QGIS.plist
That's for 1.7.x, but may also apply to 1.8.x (which is still a development …
- 6,785
0
votes
How can I reproduce Getis-Ord GI* hot-spot analysis tool in QGIS?
Assuming Hot-spot is a synonym for heat-map then this has been asked (and answered) a few times before:
How to generate heatmaps with QGIS1.9 plugin automatically?
and
How to build effective heat-m …
- 6,785
0
votes
Installing QGIS on MacOS
As well as the comment by Mapperz, you may be interested in this thread on the mailing list:
http://lists.osgeo.org/pipermail/qgis-user/2014-October/029429.html
To sumarise, "this is a side effect of … It may not be a fatal error for QGIS though (as in, QGIS may still work). …
- 6,785
1
vote
How to convert total station data (coordinates) to 3D model?
Any good GIS can do this; in the case of QGIS just add the data using the "Add delimited data". … Tutorial: http://maps.cga.harvard.edu/qgis/wkshop/import_csv.php
2) Then you need to turn it into a 3d model. This is more problematic. QGIS has poor/no real 3D support. …
- 6,785
3
votes
Which hardware configuration is necessary for QGIS?
QGIS doesn't have formal "system requirements" per-se. However, this question has been discussed before, i.e.: Specifications for GIS desktop hardware …
- 6,785
2
votes
QGIS WMS tooltip displaying web address from data
You can't, at least that's not how WMS is meant to work. You likely want WFS. There are a few questions about the differences: What are the differences between WMS, WFS, WCS, WPS?
Short version: WMS …
- 6,785